WO2018222867A1 - Coupling having seal with retracting center leg - Google Patents

Coupling having seal with retracting center leg Download PDF

Info

Publication number
WO2018222867A1
WO2018222867A1 PCT/US2018/035388 US2018035388W WO2018222867A1 WO 2018222867 A1 WO2018222867 A1 WO 2018222867A1 US 2018035388 W US2018035388 W US 2018035388W WO 2018222867 A1 WO2018222867 A1 WO 2018222867A1
Authority
WO
WIPO (PCT)
Prior art keywords
segments
seal
central space
shoulders
lobe
Prior art date
Application number
PCT/US2018/035388
Other languages
English (en)
French (fr)
Inventor
Philip Wayne Bancroft
Original Assignee
Victaulic Company
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to EP18808831.4A priority Critical patent/EP3631273A4/en
Priority to KR1020197038129A priority patent/KR20200010495A/ko
Application filed by Victaulic Company filed Critical Victaulic Company
Priority to NZ758192A priority patent/NZ758192B2/en
Priority to JP2019566334A priority patent/JP6951475B2/ja
Priority to CN201880036065.8A priority patent/CN110662917B/zh
Priority to KR1020237018905A priority patent/KR20230087614A/ko
Priority to KR1020217025957A priority patent/KR20210104176A/ko
Priority to EP23181359.3A priority patent/EP4235003A3/en
Priority to RU2019137428A priority patent/RU2733892C1/ru
Priority to AU2018278815A priority patent/AU2018278815B2/en
Priority to PE2019002474A priority patent/PE20200051A1/es
Priority to MX2019014389A priority patent/MX2019014389A/es
Priority to CA3065508A priority patent/CA3065508C/en
Priority to BR112019022062-3A priority patent/BR112019022062B1/pt
Publication of WO2018222867A1 publication Critical patent/WO2018222867A1/en
Priority to ZA2019/06942A priority patent/ZA201906942B/en
Priority to PH12019502507A priority patent/PH12019502507A1/en
Priority to SA519410541A priority patent/SA519410541B1/ar
Priority to CONC2019/0013093A priority patent/CO2019013093A2/es
Priority to AU2020289814A priority patent/AU2020289814B2/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L21/00—Joints with sleeve or socket
    • F16L21/06—Joints with sleeve or socket with a divided sleeve or ring clamping around the pipe-ends
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L17/00—Joints with packing adapted to sealing by fluid pressure
    • F16L17/02—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket
    • F16L17/04—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket with longitudinally split or divided sleeve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L21/00—Joints with sleeve or socket
    • F16L21/002—Sleeves or nipples for pipes of the same diameter; Reduction pieces
    • F16L21/005—Sleeves or nipples for pipes of the same diameter; Reduction pieces made of elastic material, e.g. partly or completely surrounded by clamping devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L21/00—Joints with sleeve or socket
    • F16L21/06—Joints with sleeve or socket with a divided sleeve or ring clamping around the pipe-ends
    • F16L21/065—Joints with sleeve or socket with a divided sleeve or ring clamping around the pipe-ends tightened by tangentially-arranged threaded pins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L25/00—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means
    • F16L25/12—Joints for pipes being spaced apart axially
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L25/00—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means
    • F16L25/14—Joints for pipes of different diameters or cross-section
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L23/00—Flanged joints
    • F16L23/04—Flanged joints the flanges being connected by members tensioned in the radial plane
    • F16L23/08—Flanged joints the flanges being connected by members tensioned in the radial plane connection by tangentially arranged pin and nut

Definitions

  • This invention relates to mechanical couplings and seals for joining pipe elements.
  • One form of mechanical pipe coupling comprises segments attached to one another end to end surrounding a central space.
  • a seal for example a ring seal formed of an elastomeric material, is captured between the segments.
  • the segments are attached end to end using adjustable attachment members, for example, lugs positioned at each end of each segment which receive fasteners joining the ends. Examples of such couplings are disclosed in US Patent No. 7,712,796.
  • the segments surround and engage the ends of pipe elements to form a mechanical joint, and the seal is compressed between the segments and the pipe elements to ensure fluid tightness.
  • preassembled state of the coupling promotes rapid formation of the joint as the coupling need not be disassembled and reassembled when connecting the pipe elements.
  • Prior art couplings support the segments in the preassembled state on the outer circumference of the ring seal.
  • the coupling comprises first and second segments attached to one another end to end and surrounding a central space.
  • Each of the segments has a channel extending circumferentially around and facing the central space.
  • Each of the channels is defined by first and second shoulders located on opposite sides of the segments and a back surface extending between the shoulders.
  • Each shoulder comprises a first surface facing the central space and a second surface oriented at an angle with respect to the first surface.
  • the first and second surfaces of the first shoulder meet at a first cusp, the first and second surfaces of the second shoulder meet at a second cusp.
  • a seal is positioned within the central space.
  • the seal comprises a ring having first and second lobes positioned on opposite sides thereof.
  • First and second attachment members are positioned at opposite ends of each of the segments attaching the segments to one another.
  • the attachment members are adjustably tightenable for drawing the segments toward one another.
  • Contact between the first cusp and the first lobe and the second cusp and the second lobe between the first and second attachment members on each the segment maintains the first and second segments in spaced relation sufficient to permit insertion of the pipe elements into the central space.
  • first and second lobes contact the second surfaces of the first and second shoulders adjacent to the first and second attachment members when the first and second segments are in the spaced relation.
  • the seal further comprises a center leg positioned between the first and second lobes.
  • the center leg projects toward the central space.
  • An example embodiment may further comprise first and second arcuate projections arranged on opposite sides of each of the first and second segments. The first projections extend from the first shoulders on the first and second segments, the second projections extend from the second shoulders of the first and second segments in this example. Further by way of example, the first arcuate projections may have a greater radius of curvature than the second arcuate projections.
  • Another example coupling for joining pipe elements in end to end relation comprises first and second segments attached to one another end to end and surrounding a central space.
  • Each of the segments has a channel extending circumferentially around and facing the central space.
  • Each of the channels is defined by first and second shoulders located on opposite sides of the segments and a back surface extending between the shoulders.
  • Each shoulder comprises a first surface facing the central space and a second surface oriented at an angle with respect to the first surface.
  • the first and second surfaces of the first shoulder meet at a first cusp
  • the first and second surfaces of the second shoulder meet at a second cusp.
  • a seal is positioned within the central space.
  • the seal comprises a ring having first and second lobes positioned on opposite sides thereof and a center leg between the first and second lobes.
  • the center leg projects toward the central space.
  • First and second attachment members are positioned at opposite ends of each of the segments attaching the segments to one another.
  • the attachment members are adjustably tightenable for drawing the segments toward one another and seating the seal within the channel, thereby deforming the seal.
  • the center leg is retracted toward the back surface upon deformation of the seal.
  • first and second lobes may contact the second surfaces of the first and second shoulders adjacent to the first and second attachment members when the segments are in the spaced relation.
  • first and second arcuate projections may be arranged on opposite sides of each if the first and second segments.
  • the first projections extend from the first shoulders on the first and second segments, the second projections extend from the second shoulders of the first and second segments.
  • the first arcuate projections may have a greater radius of curvature than the second arcuate projections.
  • the invention also encompasses, in combination, a pair of pipe elements and a coupling for joining the pipe elements in end to end relation.
  • the coupling comprises first and second segments attached to one another end to end and surrounding a central space.
  • Each of the segments has a channel extending circumferentially around and facing the central space.
  • Each of the channels is defined by first and second shoulders located on opposite sides of the segments and a back surface extending between the shoulders.
  • Each shoulder comprises a first surface facing the central space and a second surface oriented at an angle with respect to the first surface.
  • the first and second surfaces of the first shoulder meet at a first cusp
  • the first and second surfaces of the second shoulder meet at a second cusp.
  • a seal is positioned within the central space.
  • the seal comprises a ring having first and second lobes positioned on opposite sides thereof.
  • First and second attachment members are positioned at opposite ends of each of the segments attaching the segments to one another.
  • the attachment members are adjustably tightenable for drawing the segments toward one another.
  • Contact between the first cusp and the first lobe and the second cusp and the second lobe between the first and second attachment members on each the segment maintain the first and second segments in spaced relation sufficient to permit insertion of the pipe elements into the central space.
  • the first and second lobes contact the second surfaces of the first and second shoulders adjacent to the first and second attachment members when the first and second segments are in the spaced relation.
  • the invention also includes, in combination, a pair of pipe elements and a coupling for joining the pipe elements in end to end relation.
  • the coupling comprises first and second segments attached to one another end to end and surrounding a central space.
  • Each of the segments has a channel extending circumferentially around and facing the central space.
  • Each of the channels is defined by first and second shoulders located on opposite sides of the segments and a back surface extending between the shoulders.
  • Each shoulder comprises a first surface facing the central space and a second surface oriented at an angle with respect to the first surface.
  • the first and second surfaces of the first shoulder meet at a first cusp, the first and second surfaces of the second shoulder meet at a second cusp.
  • a seal is positioned within the central space.
  • the seal comprises a ring having first and second lobes positioned on opposite sides thereof and a center leg between the first and second lobes.
  • the center leg projects toward the central space.
  • First and second attachment members are positioned at opposite ends of each of the segments attaching the segments to one another.
  • the attachment members are adjustably tightenable for drawing the segments toward one another and seating the seal within the channel, thereby deforming the seal.
  • the invention also encompasses a method of connecting first and second pipe elements to one another using a coupling comprising first and second segments attached to one another end to end surrounding a central space.
  • a seal is positioned between the segments, the seal comprising first and second lobes on opposite sides thereof and a center leg positioned between the lobes, the center leg projecting toward the central space.
  • the method comprises:
  • Figure 1 is an isometric view of an example coupling according to the invention shown in a preassembled state
  • Figure 2 is a sectional view taken at line 2-2 of Figure 1 ;
  • Figure 3 is a sectional view taken at line 3-3 of Figure 1 ;
  • Figure 4 is an isometric view of the coupling shown in Figure 1 receiving pipe elements when in its preassembled state;
  • Figure 5 is a sectional view taken at line 5-5 of Figure 4;
  • Figure 6 is an isometric view of the coupling shown in Figure 1 joining pipe elements;
  • Figure 7 is a sectional view taken at line 7-7 of Figure 6;
  • Figure 8 is a longitudinal sectional view of another embodiment of a coupling according to the invention.
  • FIG. 1 shows an example embodiment of a coupling 10 according to the invention.
  • Example coupling 10 comprises first and second segments 12 and 14 attached to one another end to end and surrounding a central space 16.
  • first and second adjustably tightenable attachment members 18 which comprise lugs 20, 22 positioned at opposite ends of each segment 12, 14.
  • Lugs 20, 22 receive fasteners, such as bolts 24 and nuts 26 which draw the segments 12 and 14 toward one another when tightened.
  • a seal 28 is positioned between the segments 12 and 14.
  • seal 28 comprises a ring 30 having first and second lobes 32 and 34 positioned on opposite sides of the ring. Lobes 32 and 34 extend circumferentially around the ring 30.
  • a circumferentially extending sealing surface 36 is positioned at the end of each lobe 32, 34. Sealing surfaces 36 face the central space 16 and engage pipe elements to effect a fluid tight joint as explained below.
  • a center leg 38 extends from ring 30 toward the central space 16. The center leg 38 extends circumferentially around the ring 30 and acts as a pipe stop to ensure that pipe elements are properly seated within the coupling as described below.
  • each segment 12 and 14 (14 shown) comprises a channel 40 extending circumferentially around each segment, the channels 40 facing the central space 16.
  • Each channel 40 is defined by first and second shoulders 42 and 44 and a back surface 46.
  • Shoulders 42 and 44 are located on opposite sides of segments 12 and 14 and the back surface 46 extends between the shoulders.
  • First shoulder 42 comprises a first surface 48 which faces the central space 16, and a second surface 50 oriented at an angle with respect to the first surface 48.
  • the first and second surfaces 48, 50 meet at a first cusp 52.
  • Second shoulder 44 comprises a first surface 54 which faces the central space 16, and a second surface 56 oriented at an angle with respect to the first surface 54.
  • the first and second surfaces 54, 56 meet at a second cusp 58.
  • first and second cusps 52, 58 are rounded, but other shapes are feasible.
  • coupling the segments 12 and 14 also comprise arcuate projections 60 and 62 arranged on opposite sides of each segment 12 and 14.
  • the arcuate projections also called “keys” engage circumferential grooves in the pipe elements to provide mechanical engagement as described below.
  • Figure 1 shows the coupling 10 in the "preassembled state" wherein the segments 12 and 14 are supported on the seal 28 in spaced apart relation sufficient to permit pipe elements to be inserted into the central space 16 as described below.
  • the fasteners (bolts 24, nuts 26) hold the segments 12 and 14 against the seal 28 in the preassembled state.
  • separation of the segments 12 and 14 in the preassembled state is maintained because the first and second cusps 52 and 58 respectively contact the first and second lobes 32 and 34 of the seal 28.
  • Contact between the cusps 52, 58 and the lobes 32, 34 extends circumferentially over a substantial portion of the segments 12 and 14.
  • portions of the seal 28 adjacent to the attachment members 18 seat within the channel 40, as evinced by deformation of the lobes 32 and 34 toward one another as the first lobe 32 contacts the first surface 50 of the first shoulder 42 and the second lobe 34 contacts the second surface 56 of the second shoulder 44.
  • FIGS 4-7 illustrate use of the example coupling 10. As shown in Figure
  • pipe elements 64 and 66 are inserted into the central space 16 defined by the segments 12 and 14. Insertion is possible because the segments 12 and 14 are supported in spaced relation by contact between the cusps 52 and 58 and the lobes 32 and 34 as shown in Figure 5.
  • the pipe elements are inserted into the central space 16 to the extent that they contact the center leg 38 of the seal 28, which acts as a pipe stop. When the ends of the pipe elements 64 and 66 contact the center leg 38 each arcuate projection 60, 62 aligns with a respective circumferential groove 68, 70 in each pipe element.
  • FIG 8 shows another embodiment of a pipe coupling 80 according to the invention.
  • Coupling 80 differs from the example embodiments described above in that the first arcuate projections on one side of segments 86 and 88 have a greater radius of curvature 90 than the radius of curvature 92 of the second arcuate projections 94 and 96 on the opposite side of segments 86 and 88.
  • Coupling 80 is a "transition" coupling which permits larger diameter pipe elements 98 to be connected to smaller diameter pipe elements 100.
  • Figure 8 shows the lobes 102 of seal 102 deformed and forming a fluid tight seal between the pipe elements 98 and 100 and the coupling 80. Center leg is shown retracted from the fluid flow path so that it does not cause turbulence and head loss.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Gasket Seals (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)
  • Joints With Sleeves (AREA)
  • Joints Allowing Movement (AREA)
  • Joints With Pressure Members (AREA)
  • Seal Device For Vehicle (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Pens And Brushes (AREA)
  • Valve Housings (AREA)
PCT/US2018/035388 2017-06-02 2018-05-31 Coupling having seal with retracting center leg WO2018222867A1 (en)

Priority Applications (19)

Application Number Priority Date Filing Date Title
PE2019002474A PE20200051A1 (es) 2017-06-02 2018-05-31 Acoplamiento que tiene un sello con pata central retractil
AU2018278815A AU2018278815B2 (en) 2017-06-02 2018-05-31 Coupling having seal with retracting center leg
MX2019014389A MX2019014389A (es) 2017-06-02 2018-05-31 Acoplamiento que tiene un sello con pata central retractil.
KR1020197038129A KR20200010495A (ko) 2017-06-02 2018-05-31 인입형 중앙 다리가 구비된 시일을 가지는 커플링
CN201880036065.8A CN110662917B (zh) 2017-06-02 2018-05-31 具有带缩回的中心腿的密封件的联接件
KR1020237018905A KR20230087614A (ko) 2017-06-02 2018-05-31 시일을 가지는 커플링
KR1020217025957A KR20210104176A (ko) 2017-06-02 2018-05-31 인입형 중앙 다리가 구비된 시일을 가지는 커플링
EP23181359.3A EP4235003A3 (en) 2017-06-02 2018-05-31 Coupling having seal with retracting center leg
RU2019137428A RU2733892C1 (ru) 2017-06-02 2018-05-31 Соединительная муфта, имеющая уплотнение со втягиваемой центральной ножкой
EP18808831.4A EP3631273A4 (en) 2017-06-02 2018-05-31 COUPLING WITH A GASKET WITH RETRACTABLE CENTRAL BRANCH
JP2019566334A JP6951475B2 (ja) 2017-06-02 2018-05-31 中心脚部を後退させることを伴うシールを有する結合具
NZ758192A NZ758192B2 (en) 2017-06-02 2018-05-31 Coupling and seal arrangement
CA3065508A CA3065508C (en) 2017-06-02 2018-05-31 Coupling having seal with retracting center leg
BR112019022062-3A BR112019022062B1 (pt) 2017-06-02 2018-05-31 Métodos para manter primeiro e segundo segmentos de um acoplamento em relação espaçada em um estado pré-montado e para conectar primeiro e segundo elementos de tubo um ao outro
ZA2019/06942A ZA201906942B (en) 2017-06-02 2019-10-22 Coupling having seal with retracting center leg
PH12019502507A PH12019502507A1 (en) 2017-06-02 2019-11-07 Coupling having seal with retracting center leg
SA519410541A SA519410541B1 (ar) 2017-06-02 2019-11-12 وصلة ذات سداد محكم له ساق مركزية منسحبة
CONC2019/0013093A CO2019013093A2 (es) 2017-06-02 2019-11-25 Acoplamiento que tiene un sello con pata central retráctil
AU2020289814A AU2020289814B2 (en) 2017-06-02 2020-12-17 Coupling having seal with retracting center leg

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201762514229P 2017-06-02 2017-06-02
US62/514,229 2017-06-02

Publications (1)

Publication Number Publication Date
WO2018222867A1 true WO2018222867A1 (en) 2018-12-06

Family

ID=64455055

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2018/035388 WO2018222867A1 (en) 2017-06-02 2018-05-31 Coupling having seal with retracting center leg

Country Status (19)

Country Link
US (3) US11168816B2 (ja)
EP (2) EP4235003A3 (ja)
JP (2) JP6951475B2 (ja)
KR (3) KR20200010495A (ja)
CN (1) CN110662917B (ja)
AU (2) AU2018278815B2 (ja)
BR (1) BR112019022062B1 (ja)
CA (2) CA3176632A1 (ja)
CL (3) CL2019003493A1 (ja)
CO (1) CO2019013093A2 (ja)
MX (2) MX2019014389A (ja)
NZ (1) NZ770487A (ja)
PE (1) PE20200051A1 (ja)
PH (1) PH12019502507A1 (ja)
RU (1) RU2733892C1 (ja)
SA (1) SA519410541B1 (ja)
TW (1) TWI723267B (ja)
WO (1) WO2018222867A1 (ja)
ZA (1) ZA201906942B (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4168701A4 (en) * 2020-06-17 2024-05-01 Tyco Fire Products Lp PIPE COUPLING SEAL

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220010896A1 (en) * 2018-11-16 2022-01-13 Tyco Fire Products Lp Systems and methods of quick install gasket
RU2766376C1 (ru) * 2021-02-24 2022-03-15 Общество с ограниченной ответственностью «Новые Трубные Технологии» Стальная муфта
WO2023055760A1 (en) * 2021-10-01 2023-04-06 Victaulic Company Enhanced stability gasket and coupling

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US20160327192A1 (en) * 2009-10-27 2016-11-10 Tyco Fire Products Lp Systems and methods for pipe couplings

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